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2 Walk-Around The latest Komatsu technology and components combine to put the HM400-2 articulated dump truck in a class of its own. A powerful ecot3 Komatsu engine offers maximum productivity and fast travel speeds while several original features help to further enhance efficiency and reduce maintenance costs. With a robust exterior and state of the art solutions for its suspension and retarder systems, the HM400-2 is a machine that is built to last. First-class operator comfort Wide, spacious cab Unique hydro-pneumatic trailing arm suspension Easy-to-use controls Low operating noise levels Double doors and power window Easy maintenance Tilting cab Centralized grease points Maintenance-free oscillating hitch Maintenance-free brakes Ground level battery access 2

4 High Productivity and Efficiency Powerful and efficient ecot3 engine Certified for EPA Tier III and EU Stage IIIA emission regulations, the Komatsu SAA6D140E-5 ecot3 engine provides high torque, a better performance at slow speeds and low fuel consumption. It features a new design for the combustion chamber with an optimised ignition and combustion timing. For increased fuel efficiency, the operating pressure of the new common rail system also ensures optimal injection, and the air-to-air intercooler reduces the temperature of the compressed air supplied by the turbo charger to the cylinders. Engine power mode selection Sometimes extra power is required to get the job done, and the HM400-2 lets the operator quickly react to severe operating conditions. The perfect working mode is easily selected between Highpower or Economy, by simply flipping a switch in the operator s cab. - High-power mode For use on high production job sites or when uphill hauls are required. Take full advantage of this high output power mode and enjoy greater productivity and reduced cycle times. Large capacity body and box section frame structure With a payload of 36,5 tonnes, the HM400-2 s body capacity is among the highest for a truck in this class. A loading height of only mm enables easy loading, lowers the centre of gravity and maintains a high ground clearance. The body is made of high-strength and wear-resistant steel, with a Brinell hardness of 400. Its shape provides excellent durability and load stability. Rugged enough for the toughest jobs, the HM400-2 s frame is designed with a rigid box structure and connecting torque tubes made of high strength low alloy steel. Komatsu-designed differential locking systems The full-time six-wheel drive system uses a wet multiple-disc interaxle clutch that locks the three axles in unison for greater traction. The interaxle lock can be switched to manual or automatic while the truck is travelling, ensuring uninterrupted productivity. In combination with the limited slip differentials, the system provides an ideal solution to tyre slip, and automatically regulates the traction according to ground conditions. - Economy mode For work under normal conditions. The fastest engine speed for maximum output, downshift, and upshift is set lower. Articulated steering Fully hydraulic and articulated steering offers low-effort operating and great manoeuvrability. A minimum turning radius of only 8,70 m makes it easy to work in tight areas. 8,70 m 4,17 m 4

5 Body options To further enhance productivity, Komatsu offers several body options: for lower density materials, side extensions will increase the body capacity. To avoid sand or gravel spillage on steeper grades, an overhung tailgate is available. Body heating can be used to keep some materials from sticking, and tough wear plate can be installed when loading shot rock. 5

6 First-Class Operator Comfort Wide and comfortable cab The wide cab with user-friendly controls provides a spacious and comfortable working environment. A fully adjustable air-suspension seat dampens vibrations, holds the operator safe, and reduces the fatigue of long shifts. Plenty of room is left for an extra full-size trainer s seat. Large front and electric side windows ensure superior visibility and increased operator confidence, while an electric heated rear window facilitates defrosting and speeds the start-up of operations. Steering wheel and pedals A tilting, telescopic steering column helps to maintain an optimal driving position at all times. Low effort pedals reduce operator fatigue when working continuously for long periods. Low noise levels To reduce the noise levels, the cab is mounted on viscous dampeners. Further noise reduction is achieved by the integrated cab floor: it makes the cab air-tight and seals off the engine compartment. A lownoise and sound-insulated muffler / exhaust pipe also helps to bring the sound levels way down. Easy-to-see instrument panel It s easy to monitor all critical machine functions on the instrument panel, and a caution light will warn the operator should a problem arise. This Komatsu on-board monitoring system makes the machine user-friendly and simple to service. Electric body dump control lever The low-effort lever makes dumping easier than ever, and a standard dump counter keeps track of the total daily production. Unique hydro-pneumatic suspension On both the front and rear axles, Komatsu s unique trailing arm hydro-pneumatic suspension gives the HM400-2 a smooth ride with reduced pitching and excellent driving comfort. Less shocks to the operator and to the machine components - and less spilled material - also result in increased durability, comfort, and productivity. 6

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8 Excellent Durability Market leading Komatsu design Lowest brake maintenance cost Made from Komatsu manufactured components that successfully prove their durability day after day, the top-selling HM400-2 sets the mould for all other Komatsu ADTs. The entire power train is Komatsudesigned and the engine, transmission and axles are perfectly matched for unsurpassed productivity and durability. No other manufacturer offers wet disc brakes on all its ADTs, and the Komatsu HM400-2 is no exception. No matter how abrasive the application, there is no need to worry about early replacement of the brake disc packs of its forced oil-cooled wet disc brakes. Embedded in an oil bath and sealed off from the environment, brakes on the HM400-2 have an exceptionally long overhaul period that can go over hours - and they can last a lifetime. K-ATOMiCS transmission K-ATOMiCS, Komatsu s exclusive electronically controlled transmission is perfectly tuned for the HM The electronic clutch modulation system ensures proper pressure when the clutch is engaged. The total control system manages both the engine and transmission by monitoring the vehicle s condition. This Komatsudesigned technology guarantees smooth shifting and maximises transmission life. Hydraulically controlled wet multi-disc brakes and retarder Komatsu-designed electronically controlled countershaft transmission 8

14 Komatsu Satellite Monitoring System KOMTRAX is a revolutionary machine tracking system designed to save you time and money. You can now monitor your equipment anytime and anywhere. Use valuable machine data received via the KOMTRAX web site to optimise your maintenance planning and machine performances. KOMTRAX can assist you with: Full machine monitoring Get detailed operation data to know when your machines are used and how productive they are. Total Fleet Management Keep track of the location of your machines at all times and discourage unapproved usage or theft. Complete machine status Receive warnings, alerts and cautions, via a web site or by , to help with maintenance planning and for longer machine life. For further details on KOMTRAX, please ask your Komatsu dealer for the latest KOMTRAX brochure.

15 KOMTRAX Machine working time - With the daily working record chart, get precise engine running time data: when your machine was started and when it was shut down, as well as total engine running time. Maintenance planning - To increase productivity and improve maintenance planning, alerts indicate when items such as filters or oil must be replaced. Fleet location - The machine list instantly locates all your machines, even those in other countries. Machine tracking during transport - When your machine is transported, KOMTRAX sends travel messages to the web site or by to inform you of its progress, and confirms when it reaches its destination. Alarm notifications - You can receive notification of alarms both via the KOMTRAX website and by . Added security - The engine lock feature allows to program when a machine s engine can be started. And with geo-fence, KOMTRAX sends notification every time your machine moves in or out of a predetermined operating area. 15

Walk-Around HM400-2 The latest Komatsu technology and components combine to put the HM400-2 articulated dump truck in a class of its own. A powerful ecot3 Komatsu engine offers maximum productivity and

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